Today was a beginning and an ending. We began the new unit, Energy: Conservation and Transfer and ended the month of November. We are also on the countdown to winter break with three full weeks and then two weeks off. The energy unit has two sections (energy, light) so we will focus on the first part before the break and pick up the second part when we return in January.
To begin the new unit, the warm-up was all about energy and to see how much the students know about it.
I had the class then open their agendas and write down the following important dates:
Quizzes: Friday, December 11
Thursday, January 14
Unit test: Thursday, January 21
Wednesday, December 2: E is due for the project
Tuesday, December 15: F,G,H,I are due for the project
Friday, December 11: winter dance
December 21-January 1: winter break
Thursday, January 14: class/group pictures
Monday, January 18: Martin Luther King Day (no school)
Tuesday, January 19: J,K,L,M are due for the project
Wednesday, January 20: early release day
end of second quarter
Monday, January 25: teacher workday
Wednesday, January 27: begin Earth in the Universe unit
Then I had the students take notes on the first part of the section in the unit. The following is what they need to know:
Energy is the ability to do work, or to bring about change.
· Work is when a force applied to an object actually moves the object. Without motion, there is no work.
· The basic forms of energy are: light, heat, sound, electrical, and mechanical (energy of motion)
· There are two types of mechanical energy: potential and kinetic
· Potential Energy – stored or built up energy
· Kinetic Energy – the energy of motion
· All matter has some degree of heat.
· A light bulb produces two types of energy: light and thermal
· Heat is the rate of how fast atoms and molecules are vibrating. The faster the vibration, the more heat.
· Heat also means the transfer of thermal energy from one object to another
· First law of thermodynamics: energy cannot be created nor destroyed. It can only be transferred.
· The second law of thermodynamics: Heat transfer always moves from warmer to colder
· Heat and thermal mean the same thing
· Increasing or decreasing thermal (or heat) energy causes matter to change from one phase to another (solid, liquid, gas)
· Friction is the resistance that one surface or object encounters when moving over another surface or object
· Friction causes heat to build up. The more friction = more heat
· Electricity flowing through an electrical circuit produces magnetic effects in the wires in an electromagnet
· In an electrical circuit containing a battery, a bulb, and a bell, energy from the battery is transferred to the bulb and the bell, which in turn transfer the energy to their surroundings as light, sound, and heat (thermal energy).
Lastly, I FINALLY was able to upload the video of how to make a Mobius strip to YouTube. It is on my Try This at Home page.